Friction draft-rigging.



J. F. OGONNR. PRIGTION DRAFT RIG-YING. vAPPLHLATIoI FILED JULY 21,1910.

981,790. Patented Jari. 17, 191'1.

'2 s'HEETs-BHEET 1.

WITNESSESZ INVENTOR JOHN F. OQONNOR, OF CHICAGO, ILLNOIS, ASSIGNOB. TO WILLIAM H. MINEB, UF

CHCAGU, ILLINQXS.

rRrCTrcN DRAFT-mooiste.

Speccation of Iietters Patent.

Patented Jan. 17, 15911.

Application ined my 21,`1e1o. serial' No. 573,004(

My invention relates to improvements infriction draft rigging for railway cars.

In the accompanying drawing forming a part of this specification,Figu1-e 1 is a side elevation, partly in central, vertical, longitudinal section of a friction draft rigging embodying my invention. Fig. 2 is a plan view, lpartly in horizontal section. Fig. 3 is a cross section of 'thcfriction shell and contained parts on line 3-3 of Fig 9.. Fig. 1 is an end view of the friction shell and contained parts. Fig. 5 is a detail perspective view of one of Vthe friction shoes; and Fig. 6 is a detail perspective view' of one of the segmental friction plates with which the cylindrical friction shell is provided. `-n the drawing, 1 represents the center sills or draft members of the car frame to which 'the draft rigging is applied, 2 the front still 8 the carry iron, 1 the draw-bar, 5 the draft yoke, G, 7 front and rear followers, 8,-.S the stop members secured'to the draft sill;,`having frontstop' shoulders 9, rear stop shoulders 10 -and limiting stop shoulders 11. 12, 13 the friction shell, 111 segmental friction plates with which the friction shell is provided, 15 the friction shoes,` 16 the wedge, 17 anti-friction 'rollers interposed between the wedge `and friction Shoes, 18, 18 the springs, 19 a preliminary .compression supplemental follower interposedbetwecn the rear follower and the spring Ato'permit of a preliminary compression of the springs before the friction resistance mechanism comes into action, 2O the connecting rod and 21a bearing cap interposed between the Anut 22 of the connecting rod and the preliminary compression follower.

In order to give the friction shoes a perfect bearing against the cooperating friction element throughout substantially the entire area of their friction faces 23, and at the same time enable the friction shell to be of circular'. form in cross section vand thus adapted to properly' withstand' the enormous `burstingstrain to which it is subjected in practical operation, I provide the friction shell with one or more, preferably three, transversely extending annular ribs or friction plate anchoringvdevices Q1, and with a plurality -of se arate piece friction 'late members 14, 'each aving aflat friction ace 25 for engagement with the flat friction face 23 of the friction shoe 15, the friction plates 14; being also furnished with annulafI grooves or anchoring devices 26 to interfit with and engage the coperating anchoring devices 24 of the friction shell 13.

The friction shoes 15 are preferably three in number, andA each is provided with two flat friction faces 23 so that 'each friction shoe thus engages two of the segmental friction plates 14, the friction plates 14 being preferably six in number. Each of the friction plates 11 has a 'convexly vcurved cylindrical face 27 to fit the concave inner cylindrical face 28 of the friction shell 13.

Each of the friction shoes 15 has an inclined or wedge face 29 for cooperation with the wedge face 30 of the wedge 1G, the wedge being of pyramid-al shape and having three wedge faces. Each of the friction shoes is further provided with a transverse shoulder 31 to serve a stop for the antifriction roller 17, the wedge 16 having a cooperating stop shoulder friction shoes is also furnished with a pair of side shoulders for engagement with the ends of the anti-friction roller 17 and thus keep the roller lengthwise in position.

Between the adjacent frictionvplates 14. clearance space 31 is left so that the friction shoes and friction plates automatically ad- Each of the` just\then1selvcs to eachfther and thus in.

sure \an even bearing througl'iout'i their interengaging flat friction faces.

The interengaging anchoring devices onthe friction shell 13 and segmental friction plates-111 hold the friction plates rigidly in position longitudinally in the friction shell and prevent them .from slipping lengthwise therein.

Clearance spaces 35 are left between theadjacent longitudinal edges of the friction shoes 15 to enable the friction shoes to automatically adjust themselves properly to the faces of the wedge and. thus compensate for any untrueness or irregularity in the angles of the wedge or of the roll seats or .bearing faces of the shoes themselves.

The clearance spaces 34 between the friction plates 14 and between the friction shoes 15 enable the friction plates and fricgree of accuracy. In'my invention all contacting friction faces are straight, flat, planes, and each pair of interengaging friction faces is independently and automatically adjustable to each other independent of any and every other pair, thus making grinding, machining or fitting of the parts unnecessary. And as in my invent-ion, each pair of friction faces are independently and automatically adjustable or, capable of accommodating themselves to each other', in-

dependent of the others, it becomes imma' terial whether the interior surface of the cylinder or shell 13 is truly cylindric or otherwise. `In my invention also, the lfricat small expense.

tion plates lLPbeing separate and removable from lthe cylinder, may be readily renewed or replaced when worn and the draft gear thus' restored to perfect operative condition The friction plates 14 may, if desired, be made of non-corrosive metal, such as brass, and thus prevent the parts from becoming rusted or cemented together if the gear or the car happens to remain for months out of service. The frictionlplates 14 are preferably made of some softmetal, such as brass or malleable iron and the friction shoes 15 are preferably made of tempered or rhardened steel, their shape and form being such as to -enable them to be Very perfectly made of such material.

lI claim 1. In a friction draftl rigging, the combination with a draw-bar, draft yoke,

spring and followers, of a friction shell furnished with transversely extending annular l anchoring ribs, a lplurality of segmental vfriction plates havlng convex outer faces fied. v,

lshoes havingstraight flat 4friction faces e111.- .gaging' said friction faces of said frictionl shell having anchoring devices on its inner face,.segmental 'friction plates having conveX outer faces and coperating anchoring devices, and provided each with a Straight, flat, friction face and friction shoes havin straight, flat, friction faces engaging sai straight flat faces of saidsegmental friction plates, substantially as specified.

3. In a friction'draft rigging, a friction shell having anchoring devices on its inner face, segmental friction plates having convex outer faces and coperating anchoring devices, and provided each with a straight, flat, friction face andl friction shoes having straight, flat friction' faces engaging sai straight flaty faces of said segmental friction plates, each of said friction slices having two straight, flat, friction 'faces disposed at an angle to each other4 for simultaneous engagement with two adjacent friction plates, sub,- stantially as specified.

.4. In a friction draft rigging, the combination with a friction shell, of segmental friction plates fitting inside said friction shell and having each an inner, straight, fiat friction face, and'fricti'on shoes having straight, flat friction faces in sliding tional engagement with said friction plates, and means for preventing said friction plates from moving longitudinally in respect to said shell, substantially as specified.

5. In a friction draft rigging, the combination with a friction shell, of segmental friction plates fitting inside said friction shell and having each an inner, straight, at friction face, and friction shoes having straight, fiat friction faces in sliding fric tional engagement with said friction plates,

and 'means for preventing said friction plates from moving longitudinally in respect to said shell, there being clearance spaces between the. longitudinal edges of said friction plates, substantially as speci- JOHN F. CCONNOR.

Witnesses: 1

' EDMUND ADoocK,

H. M. MUNDAY.

fric- 

